4-8

PBL 3766

Pin Description

PLCC: 28-pin, plastic, j-leaded chip carrier. DIP: 22-pin, dual-in-line (batwing), plastic package. Refer to figure 7.

PLCC

DIP

Symbol

Description

1

-

RINGX

Sense

RINGX

requires no connection in SLIC applications, i.e. leave open.

2

1

GND

Ground.

3

-

VBAT

Refer to PLCC, terminal 6 description.

4

2

VCC

+5 V power supply.

5

3

RINGRLY Ring relay driver output. Open emitter with grounded collector (npn). Sources 50 mA from ground

to a relay coil connected to a negative voltage. Must be protected by external inductive kick-back

diode. Positive voltage relay driver can be provided as a metal mask option. Contact factory for

availability.

6, 3,

5, 6,

VBAT

Battery supply voltage. Negative with respect to GND. -21 V to -58 V. All VBAT terminals

10, 17, 17, 18

should be connected to printed circuit board traces to provide heatsinking.

24

7

4

RSG

Saturation guard programming resistor, R

nominal battery voltages from -24 V to -28 V. Connect to VEE for a nominal battery voltage of -48

V. For other battery voltages and for detailed information refer to section Battery Feed.

8

-

NC

No internal connection. Note 1.

9

7

E0

DET

output, when set to logic level high. Refer to section Enable Input for detailed information.

10

-

VBAT

Refer to PLCC, terminal 6 description.

Figure 7. Pin configuration, 28-pin plastic leaded chip carrier and 22-pin plastic dual-in-line package, top view.

1

2

3

4

5

6

7

8

9

10

11

22

21

20

19

18

17

16

15

14

13

12

VTX

GND

VCC

RINGRLY

RSG

VBAT

VBAT

E0

DET

C2

C1

RDC

RINGX

TIPX

DT

RD

VBAT

VBAT

HPR

HPT

VEE

RSN

5

6

7

8

9

10

11

25

24

23

22

21

20

19

NC

VBAT

DT

RD

HPR

HPT

VTX

RINGRLY

VBAT

RSG

NC

E0

VBAT

DET